John Herdman

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Across
  1. 3. groups on the periodic table going vertically
  2. 4. a negatively charged particle in an atoms outer shell
  3. 8. a positively charged particle in an atoms nucleus
  4. 9. solid, shiny, hard substance typically good with conduction
Down
  1. 1. two of the same element atoms that either have one more electron or one less then normal
  2. 2. the number displayed with an element on the periodic table that tells the number of protons
  3. 5. periods in the periodic table going horizontally
  4. 6. a neutral particle in an atoms nucleus
  5. 7. the smallest particles of matter
  6. 10. purest form of a sustance that cannot be broken down anymore